Red Planet’s interior may not churn much
Composition of 2.4-billion-year-old Martian meteorite matches that of younger ones
RED-HOT PLANET A meteorite that probably originated from Mars’ volcano-filled Tharsis region (warmer colors denote higher elevations in this topographic map) suggests that a source of volcano-fueling magma inside the planet remained largely unchanged for billions of years.
NASA, JPL-Caltech, Arizona State University